JP3211416U - Floating undulation gate - Google Patents

Abstract

A floating undulation gate capable of easily preventing icing is provided. A floating undulation gate 1 has a rotating shaft 11 on the base end side, and a door 10 that stands up from a fallen state by the buoyancy of intruding water, and the door is grounded or close to the door when the door is fallen. A grounding portion (the bottom portion 26 and the side portion 27 of the storage portion 25). A coating of a water-repellent paint is formed on at least one of the surface of the door that is grounded or close to the grounding portion and the surface of the grounding portion that is grounded or close to the door. [Selection] Figure 1

Description

  The present application relates to a floating undulation gate.

  Conventionally, a floating undulation gate for preventing flooding and tsunami inundation is known, and is disclosed in, for example, Patent Document 1. The floating undulation gate disclosed in Patent Document 1 includes a door body that stands up by the buoyancy of water when it is submerged. The door body lies down when it is not flooded and is in contact with the road surface, and stands up when flooded to prevent flooding.

Japanese Patent Laying-Open No. 2015-180806

  By the way, in the floating undulation gate as described above, rainwater or the like may enter and stay in the gap between the fallen door and the road surface. Normally, this accumulated water does not affect the operation of the door body, but in cold winter areas where the temperature is below freezing during the day, the accumulated water may cause icing on the door body and road surface. There is. When such icing occurs, the door body and the road surface are fixed with ice, and there is a possibility that the start of standing of the door body at the time of flooding may be delayed until the ice melts due to the flooding.

  In order to prevent such a situation from occurring, it is desirable that construction be done to the extent that there is no effect even if there is icing in the gap between the lying door body and the road surface in cold regions. Therefore, simpler measures are required.

  The technology disclosed in the present application has been made in view of such circumstances, and an object thereof is to provide a simple countermeasure against icing in a floating undulation gate.

  The floating undulation gate of the present application includes a door body and a grounding portion. The door body stands up from the lying down state due to the buoyancy of intrusion water. The said grounding part is what the said door body earth | grounds when the said door body falls down. A coating film of water-repellent paint is formed on at least one of the surface of the door body that contacts the grounding portion and the surface of the grounding portion that contacts the door body.

  According to the floating undulation gate of the present application, a simple countermeasure against icing can be provided.

FIG. 1 is a diagram illustrating a schematic configuration of a floating undulation gate according to an embodiment when viewed from the side surface side. FIG. 2 is a diagram illustrating a schematic configuration of the floating undulation gate according to the embodiment when lying down as viewed from the upstream side. FIG. 3 is a view corresponding to FIG. FIG. 4 is a view corresponding to FIG. 1 and showing the rising time of the floating undulation gate. FIG. 5 is a diagram for explaining a contact angle of a droplet with respect to a coating film.

  Hereinafter, embodiments of the present application will be described with reference to the drawings. Note that the following embodiments are essentially preferable examples, and are not intended to limit the scope of the technology disclosed in the present application, applications thereof, or uses thereof.

  The floating undulation gate 1 (hereinafter also simply referred to as the undulation gate 1) of this embodiment is installed on the road surface R (land) and prevents water from entering the living space and underground space due to flood, tsunami, and heavy rain. It is sometimes called a floating flap gate. The raising / lowering gate 1 automatically performs the standing up operation and the overturning operation using the water to enter. As shown in FIGS. 1 and 2, the undulating gate 1 includes a door body 10, a door stop 18, an auxiliary drive unit 20, and a storage unit 25.

  The door body 10 is formed in a slightly flat and substantially rectangular body. The door body 10 has a rotation shaft 11 on the base end side, and is provided to be rotatable about the rotation shaft 11. The door body 10 performs a standing operation by rotating clockwise in FIG. 1, and performs a lying operation by rotating counterclockwise in FIG. The door body 10 is normally in a fallen state (the state shown in FIG. 1), and is configured to stand up from the fallen state due to the buoyancy of the intrusion water in an emergency (that is, when water has entered). Has been. That is, the door body 10 starts a standing operation using the intrusion water.

  In FIG. 1, water enters from the left side. Further, “upstream side” and “downstream side” described below mean an upstream side (left side in FIG. 1) and a downstream side (right side in FIG. 1) in the water intrusion direction.

  In the lying down state, the door body 10 has a front part 13 on the lower side, a back part 14 on the upper side, a tip part 12 on the upstream side, and a side part 15 on the left and right sides as viewed from the upstream side. The door stop 18 is provided on the left side and the right side of the door body 10 as viewed from the upstream side. The door body 10 has a watertight rubber (not shown) attached to a side surface portion 15 that is a portion facing the doorstop 18, and is watertight when the watertight rubber contacts the doorstop 18.

  The auxiliary drive unit 20 has a function of assisting the standing operation of the door body 10 and a function of adjusting the standing speed and the falling speed of the door body 10. The auxiliary drive unit 20 includes a counterweight 21, a wire rope 22, an upstream fixed pulley 23, and a downstream fixed pulley 24.

  One upstream side pulley 23 and one downstream side pulley 24 are provided for each door 18. The upstream fixed pulley 23 is provided at the upper part of the door stopper 18 on the upstream side, and the downstream fixed pulley 24 is provided at the upper part of the door stopper 18 on the downstream side. Two wire ropes 22 are attached to the door body 10. One end of the two wire ropes 22 is attached to the distal end portion 12 of the door body 10. One ends of the two wire ropes 22 are attached to the left end and the right end in the width direction of the door 10 (left and right direction in FIG. 2). The other end of the wire rope 22 is attached to the counterweight 21 via an upstream fixed pulley 23 and a downstream fixed pulley 24 in this order. Thus, since the door body 10 and the counterweight 21 are connected via the wire rope 22, the weight of the counterweight 21 acts on the distal end portion 12 of the door body 10.

  The storage unit 25 stores the door body 10 when lying down. The storage portion 25 is a recess formed in the road surface R, and is formed in a rectangular shape that is larger than the door body 10 in plan view. In a state where the door body 10 is stored in the storage unit 25, that is, in a state where the door body 10 is lying down, the back surface portion 14 of the door body 10 and the road surface R are substantially flush with each other. Under normal conditions, a vehicle passing through the road surface R passes through the back surface portion 14 of the door body 10.

  The standing operation and the lying operation of the door body 10 will be described with reference to FIGS. 3 and 4 as well. When water enters the fallen door body 10, the door body 10 starts to stand up by the buoyancy of the intrusion water. At that time, the door body 10 is pulled in the standing direction by the counterweight 21 to assist the standing operation. The counterweight 21 descends as the door body 10 stands up. As the door body 10 stands up, water accumulates on the upstream side of the door body 10 and the water level rises. Therefore, the door body 10 is pushed in the standing direction by the water pressure, and the standing operation is assisted.

  As shown in FIG. 3, when the inclination angle θi of the door body 10 reaches a predetermined angle (for example, 45 degrees), the wire rope 22 extending from the fixed pulley 23 to the door body 10 and the door body 10 are in a straight line, The counterweight 21 reaches the lowest point. When the inclination angle θi of the door body 10 exceeds a predetermined angle, the counterweight 21 rises as the door body 10 stands up. Then, as shown in FIG. 4, when the inclination angle θi of the door body 10 reaches 90 degrees, for example, the door body 10 is in a fully upright state, and the standing up operation is completed. At this time, the counterweight 21 reaches the highest point. Thus, when the counterweight 21 is rising, the counterweight 21 becomes a resistance, and the rising speed of the door body 10 is reduced. Therefore, the impact generated when the standing operation of the door body 10 is completed is reduced.

  The door body 10 in the standing state shown in FIG. 4 starts a lodging operation as the water level decreases. At that time, the door body 10 is pulled in the falling direction by the counterweight 21 to assist the falling operation. Thus, the door body 10 falls down following the decrease in the water level. The counterweight 21 descends as the door body 10 falls down. When the inclination angle θi of the door body 10 becomes smaller than a predetermined angle (45 degrees), the counterweight 21 rises as the door body 10 falls down. As shown in FIG. 1, when the inclination angle θi of the door body 10 reaches 0 degrees, the door body 10 is completely in a lying state, and the lying down operation is completed. That is, the door body 10 is stored in the storage unit 25. At this time, the counterweight 21 reaches the highest point. Thus, when the counterweight 21 is rising, the counterweight 21 becomes a resistance, and the falling speed of the door body 10 is reduced. Therefore, the impact that occurs when the falling operation of the door body 10 is completed is reduced. In addition, inclination | tilt angle (theta) i is an inclination | tilt angle of the door body 10 with respect to a horizontal surface.

  In the storage part 25, the bottom part 26 and the side parts 27 and 28 are grounding parts to which the door body 10 is grounded or close when the door body 10 falls down. In addition, the time of the fall here means the state in which the door body 10 was completely fallen. Specifically, the front portion 13 of the door body 10 is in contact with or close to the bottom portion 26 of the storage portion 25 when lying down (see FIGS. 1 and 2). Further, the tip end portion 12 of the door body 10 is in contact with or close to the side portion 27 of the storage portion 25 when lying down (see FIG. 1). Moreover, the side part 15 of the door body 10 is earth | grounded or adjoined to the side part 28 of the storage part 25 at the time of lying down (refer FIG. 2). The side portion 27 is located on the upstream side in the storage portion 25, and the side portion 28 is located on the left and right sides (left and right in FIG. 2) in the storage portion 25.

  A coating of water-repellent paint is formed on at least one of the surface of the door body 10 that is in contact with or close to the grounding portion and the surface of the grounding portion that is in contact with or close to the door body 10. Specifically, in the door body 10 of the present embodiment, a water repellent coating film is formed on the surfaces of the front portion 13, the tip portion 12, and the side portion 15. In the storage portion 25 of the present embodiment, a water repellent coating film is formed on the surfaces of the bottom portion 26 and the side portions 27 and 28.

  The coating films formed on the front surface portion 13 and the front end portion 12 of the door body 10 have the same configuration, and the coating films formed on the bottom portion 26 and the side portion 27 of the storage unit 25 have the same configuration. It is. Here, as a representative, the coating films 17 and 31 on the front portion 13 of the door body 10 and the bottom portion 26 of the storage portion 25 will be described in detail with reference to FIG. The coating film 17 on the front surface portion 13 is formed by applying a water repellent paint to the surface of the main material 16. The main material 16 is a steel member that constitutes the front portion 13. The coating film 31 on the bottom portion 26 is formed by applying a water repellent paint to the surface of the main material 29. The main material 29 is concrete. Thus, by forming the water-repellent coating films 17 and 31, the front portion 13 of the door body 10 and the bottom portion 26 of the storage portion 25 are not easily wetted. That is, the contact area between the surface of the front portion 13 or the bottom portion 26 and the liquid droplet is reduced. Thereby, even if icing occurs on the surface of the front part 13 or the bottom part 26, the icing force is reduced. The icing force is the adhesion force of ice to the surface of the front portion 13 or the like.

  Furthermore, the coating films 17 and 31 have a surface tension such that the contact angle θc between the surfaces of the coating films 17 and 31 and droplets (water droplets) attached to the surfaces is 85 degrees or more. The contact angle θc is an angle formed by the tangent of the liquid surface and the solid surface at the contact point between the solid (coating films 17 and 31) and the liquid (droplet), and is also called wettability. As the contact angle θc is larger, the solid is less likely to get wet. The contact angle θc depends on the surface tension of the solid (coating films 17 and 31). The contact angle θc increases as the surface tension of the solid decreases. Thus, since the coating films 17 and 31 have a small surface tension with a contact angle θc of 85 degrees or more, the front portion 13 and the bottom portion 26 are more difficult to wet.

  As described above, the floating undulation gate 1 of the above embodiment includes the door body 10 that stands up from the fallen state due to the buoyancy of the intrusion water, and the grounding portion (storage portion) where the door body 10 is grounded or close when the door body 10 falls down. 25 bottom portions 26, side portions 27, 28). Then, water-repellent paint films 17 and 31 are formed on at least one of the surface of the door body 10 that is grounded or close to the grounding portion and the surface of the grounding portion where the door body 10 is grounded or close.

  According to the above configuration, even if water enters and stays in the gap between the door body 10 and the grounding portion that are grounded or close to each other, at least one of the door body 10 and the grounding portion is difficult to wet. Therefore, even if icing occurs on the surfaces of the door body 10 and the grounding portion that are in contact with or close to each other, the icing force can be reduced. As a result, the force with which the door body 10 and the ground contact portion are fixed by ice is reduced, so that when the water enters, the door body 10 starts to stand up by the buoyancy of the ingress water without waiting for the time until the ice melts. Can be made.

  Moreover, the coating films 17 and 31 have a surface tension which makes the contact angle of the surface of the coating films 17 and 31 and the droplet adhering to the surface become 85 degree | times or more. According to this configuration, it is possible to reliably prevent the surface of the door body 10 and the grounding portion that are grounded or close to each other from getting wet. Therefore, even if icing occurs on the surfaces of the door body 10 and the grounding portion that are in contact with or close to each other, the door body 10 can be easily moved by the buoyancy of the ingress water without waiting for the time for the ice to melt when water enters. Can start standing up.

  In the embodiment described above, the water-repellent coating film 17 may be formed at any one or two of the front portion 13, the tip portion 12, and the side portion 15 in the door body 10. Similarly, the coating portion 31 of the water repellent paint may be formed at any one or two of the bottom portion 26 and the side portions 27 and 28 in the storage portion 25.

  Moreover, in the said embodiment, you may make it form the coating films 17 and 31 of a water repellent paint in any one among the door body 10 and a grounding part.

  In the above embodiment, the auxiliary drive unit 20 may be omitted. In that case, the door body 10 performs the standing-up operation and the overturning operation only by the buoyancy and water pressure of the intrusion water.

  As described above, the technique disclosed in the present application is useful for floating undulation gates.

DESCRIPTION OF SYMBOLS 1 Floating type undulation gate 10 Door body 17 Paint film 26 Bottom part (grounding part)
27 Side (grounding part)
28 Side (grounding part)
31 Coating film θc Contact angle

Claims (2)

A door body that stands up from a lying state due to the buoyancy of infiltrated water,
A grounding portion where the door body is grounded or approached when the door body falls down,
A floating body characterized in that a water repellent paint film is formed on at least one of a surface of the door body that is in contact with or close to the grounding portion and a surface of the grounding portion that is in contact with or close to the door body. Expression relief gate. The floating flap gate according to claim 1,
The floating undulation gate according to claim 1, wherein the coating film has a surface tension at which a contact angle between the surface of the coating film and a droplet attached to the surface is 85 degrees or more.

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